Joe, thanks for the link.
Bill, I want to go the same route.
You can also check out
hurst . They have a 3 speed, floor shift for 55 AND UP 3100. I doubt thet either of these choices will be a direct bolt-on, as pre-55's are slightly different.
Hey! Here is a great idea! Why dont you go ahead with the conversion and do a thorough pictorial? Yeah, that'd be swell!
Whizzerick